Open Problems for Undergraduates Open Problems by Area Graph Theory Combinatorial Geometry Geometry/Number theory Venn Diagrams Inequalities Polyominos This is a collection of open problems in Discrete Mathematics which are currently being researched by members of the DIMACS community. These problems are easily stated, require little mathematical background, and may readily be understood and ...

Some Problems in Matroid Theory Compiled by Thomas Zaslavsky Sources Oxley's book has an entire chapter of open problems. (Some may have been solved by now.) Joseph P.S. Kung has written two articles called ``surveys'' that are replete with new results and open problems: ``Extremal matroid theory'', in: Neil Robertson and Paul Seymour, eds., Graph Structure Theory, pp. 21-61. Contemporary ...